Alarm apparatus.



D. P. PAPAPAVLOU.

ALARM APPARATUS.

APPLICATION man Nov. 10, 1916.

1,283.282. Patented Oct. 29, 1918'.

2 SHEETS-SHEET \NVENTOH q flemefrzasfij hpa vavlbu. 5 WITNESSES M4 2 BY W D. P. PAPAPAVLOU.

ALARM APPARATUS.

APPLICATION FILED nov. :0. 191a.

Patent-ed Oct 29, 1918.

2 SHEEIS-SHEET 2.

HQ 0 w a J W m WITNESSES ATTOH N EY DEHETRIOS P. PAPAPAVLOU, OF WASHINGTON, DISTRICT OF COLUMBIA.

ALARM APPARATUS.

Specification of Letters Patent.

Patented Oct. 29, 1918.

Application filed lmromber 10, 1918. Serial No. 130,615.

7 '0 all whom it may concern:

Be it known that I, DEMETRIOS P. Pins-- PAVDOU, a subject of the King of Greece, residing at \Vashington, in the District of Columbia, have invented certain new and useful Improvements in Alarm Apparatus. of which the following is a specification.

This invention has relation to improvements in alarm apparatus and it comprehends, more particularly, an improved device that is designed to be used in oonnection with doors, windows and other structures of a like nature, to detect, in the first case, the turning of the door knob in either direction and thus cause the ringing of an alarm, and in the second case or when used in connection with a window, to cause the ringing of an alarm upon the slightest opening movement of the window sash.

A further object of the invention is to provide a device of the type in question that is extremely simple in construction, strong and durable, and highly practical from both the standpoint of the manufacturer and the standpoint of the user; and which, it is believed, may be manufactured at a comparatively low cost.

Various other objects and advantages will become apparent during the continuance of the following description.

These objects are accomplished by such means as are shown in their preferred form in the accompanying drawings, described in the following specification and then more specifically pointed out in the appended claims.

In the accom anying drawings wherein like characters esignate like parts throughout the several views Figure 1 is a View, in front elevation showlng my invention as in its preferred embodiment, applied to a door and door knob of conventional form,

Fig. 2 is a view in section of my invention taken on the line 22 of Fig. 3,

Fig. 3 is a View in section taken on line 3-3 of Fig. 2.

Fig. 4 is a view in cross section of the door, showing a part of the door knob broken away to show the manner of attaching certain parts of my inventionthereto Fig. 5 is a view in plan showing my invention in a slightly modified form and as used in connection with a window sash of conventional form,

i slightly modified form such as adapted to be used in connection with a door latch.

Referring now more particularly to that embodiment of my invention shown in Figs. 1 to 4 inclusive, 1U designates a door of any desired form, 11 indicates a sleeve that on gages a spindle as shown in Fig. 4, while 12 designates a door knob of conventional form.

In the present embodiment of my invention 13 is a suitable casing in which is arranged certain clockwork mechanism, which consists in part of a. main spring ll, a gear wheel. 15, a pinion 16 with which said gear wheel meshes and a ratchet wheel 17. Such mechanism is preferably carried on shafts 18 and 1.9, although any other arrangement may be provided if desired.

In connection with the clock work mechanism above described, I arrange on the shaft 20, an oscillating member 21 to co-act with the wheel 17, said member being adapted for oscillation by said wheel 17 upon rcleasement of the latter, as will be subsequently set forth. The member 21 is also desi ed to operate a hammer 24 to ring the hel 25.

Dog 26 is pivotally mounted as at 27, its forward end portion normally engaging the wheel 17 to prevent operation thereof while its other end lies in the path of movement of certain actuating means as will be subsequently described.

On the upper side of the casing 13 I arrange a hollow standard or other support 28 through which is passed an actuating rod 29. At its inner end rod 29 may be slightly enlarged as at 30 to properly engageone end of the'dog 26 while at its outer end it carries an operating portion 31 to facilitate the proper thrusting thereof such as will result in the rocking of the do 26 and the releasement of the wheel 17. nterniediate its ends the rod is provided with a slightly enlarged squared portion 32 which passes through a complemental opening in the oasing thus preventing turning movement of the rod without forming any im ediment to the operatiomthereof. On the ot or hand standard 28 is provided with a transverse partition 33 through which the 'rod extends and against which bears an expansion coil 41, to the lower ends of the said arms. A

{guide 42 of. suitable construction is posi- .1,ioned on the door slightly above the operat- 15 ingportion of the actuating rod 29, the arpose of this guide being to retain rods 0 1 11 enga ement with the operating portion as is clear y shown in Fig. 1.

From the above it will be obvious that upon turning of the knob 12 in either direction one of the rods 40 will be thrust downwardly thus causing a like movement of the actuating rod 29 against the tension of the expansion spring 34, rocking the dog 26 to release the wheel 17 so as to permit operation of the clock work mechanism and the consequent, ringing of the bell 25.

In the embodiment shown in Figs. 5 to .7 inclusive I secure the casing 13 to the window frame or other support 43, at any desired location and preferably on the inner side of the frame. I further provide the standard 28 with an extension, or rather an addition 44, which may be in the form of a housing such as clearly shown in Fig. 6, which serves to pivotally support as at 45 an actuating lever 46.

The free end of actuating lever 46 normally engages the operating portion 31 of the rod 29, while its other end portion is bent to form an arm 47 that extends to a point adjacent the sash 48 and which connects .with a link 49. Link 49 in turn connects with a spring 50, while the spring 50 in turn connects with a rod fihyghichhas a ortion' 52 for connection with the sash. he portion 52 of the rod 50 may be embedded in the sash or else it may sim 1y be enga ed with the upper face thereo as shown m Fig. any event the shghtest u ward movement'ofthe sash will cause a me ing of thelever 46 and the co uent actuation of the lamb apparatus. owever the spring 50 will compensate for the varying heights to which the window may be raise thus avoiding the breaking of any of the parts of the af plaratus. In Fig. 8

y avefshosvn the (visual latcho rat 'ortionoa oorsu asdeslgdniiad ii? a when 58, rovided with a depending rod 54 such rod ing, of'co capable of movi the actuating 1011 29 0 my device should desire to use in invention in connection with a door having that type of securing means. V

nism against movement so that the door or window, which ever the case may be can be opened or closed without causing the operation of the alarm device. To this end I provide casing 13 with a transverse shaft 22 that extends above the gear wheel 15 of the opersting mechanism (see Fig. 2) and which carrles 1n alinement with said gear a lug or detent 22' that is adapted to interme s'ilvwith and prevent rotation of said gear heel. Of course, when the detent is in the position shown in Fig. 2 the mechanism willbe allowed to operate 'ust as soon as it is released by the dog 26. ikewise, I may if desired provide means such as shown at 29' whereby the length of the actuating shaft 29 may be regulated by the operator.

From the foregoing it; is believed that the advantages and novel features of my invention will be readily understood and therefore further detailed description is deemed unnecessary.

In reducing the invention to practice, it will be found that the form referred to herein as the most practical and preferred embodiment is the most efiicient, but realizing. that certain conditions will necessarily vary in concurrence with the adoption of the device, it is emphasized that various minor changes in the details of construction and in the proportion of parts may be resorted to when required without sacrificing any of the advantages of the invention,.as defined in the appended claims.

Having thus fully described the invention, what is claimed as new and desired tobe secured by Letters Patent is:

1. An alarln device including a casing, a hollow standard extending outward from the casing, alarm mechanism within the casing, a rod extendin throu hsaid hollow standard and being Iongitu inally movable and non-rotatable and operable to control said alarm mechanism, and a connecting de vice correlated with said rod and with the rod being broadened at its upper end a adapted or disunitedcontect with an e1ement in connection with a door or-window, so that the alarm will be oggvrcted upon movement of the door or win 8. In an alarm apparatusoi the class described. the combination with a window frame of a casing positioned on said window frame, alarm means associated with said casing, means to operate said alarm means, means to normally retain said operating means against movement, an actuating rod adapted to move said last mentioned means to release said operating means, an extension on said casing, a lever pivoted on said extenscri a 4. In a device of the class described, the combination of a casing, an alarm mechanism'ca 'ed within said casing, a hollow standard formed upon said casin an actuating rod extending through sai standard and projecting into said casing, said rod having a squared portion engagm said casing, whereby the rod will be he d against rotary movement, means for normally urging said rod in one direction and means for forcing said rod inwardly against the urgency of the last mentioned means, thus can. ing said rod to chase the operation of said alarm mechanism.

5. In a device of the class described, the combination of a casing. an alarm mechanism carried within said casing, a hollow standard projecting above said easing a lateral extension 'ornied upon the upper end of said standard, a reciprocally mounted aetuating rod carried by said standard and projecting into the casing. a lever pivotally mounted upon said lateral extension and en gaging the outer end of said rod, means for shifting said lever. thus causing said lever to move said rod for causing the operation of said alarm mechanism.

In testimon whereof I atiix my signature in presence 0 two Witnesses.

DEMETRIOS P. PAPAPAVLOU' Witnesses Sornmos Ntcnonsoa, J. Renter KELLY. 

